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T.R. Knight to Return For a Full Season

It has been confirmed by E! Online that T.R. Knight has been signed for the full fourth season of Grey's Anatomy, and not just 12 episodes, as some rumors have suggested in recent weeks.

While the show's official rep declines comments on the details of actors' contracts, a source close to the show says it's true that Knight is under contract to return - full-time.

The blue hair, however, most likely won't be making an appearance on screen. Although it would go well with the scrubs.

T.R. Knight, along with some of his co-stars, have been the subject of recent contract discussions and rumors in what became a rather tumultuous Season 3 (and off-season) for the ABC hit medical drama.

As for his character, George O'Malley, he still has to deal with flunking his exam at the end of last season, thanks to a certain woman... or several. How will he stay at Seattle Grace? That remains to be seen. But T.R. Knight will be front and center when the show returns September 27.

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MEREDITH: "You don't get to call me a whore. When I met you, I thought I had found the person that I was going to spend the rest of my life with. I was done! All the boys and all the bars and all the obvious daddy issues, who cares? I was done. You left me. You chose Addison. I'm all glued back together now. I make no apologies for how I chose to repair what you broke. You don't get to call me a whore."DEREK: "This thing with us is finished. It's over."MEREDITH: "Finally."DEREK: "Yeah, it's done."MEREDITH: "It is done."

Did you say it? 'I love you. I don't ever want to live without you. You changed my life.' Did you say it? Make a plan. Set a goal. Work toward it, but every now and then, look around; Drink it in 'cause this is it. It might all be gone tomorrow."